Peter
would you please advise best way to do gnd connections using your F5 pcbs
I ask because I got ground loop issue although no connection on input and even using just one amp pcb
my setup - gnd Input from rca - gnd pad of F5 pcb
rails gnd pad of F5 pcb Is fed from gnd of PSU filter which can be seen with yellow wire
brown wire goes to gnd binding post

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thx Peter
I have connected as you post but there Is buzz
when short input to gnd - buzz disappear
If It Is not a problem would you tell how you have connected your setup from previous post - the filter caps that are not mounted at PSU board

__________________www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

That is not exactly from middle of filter caps, you split the ground in two after grey wire "extention" . How about connecting both yellow wires directly to copper strips on filter caps?

__________________www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

at first I had connected both yellow wires to the gnd of last filter caphttp://www.diyaudio.com/forums/showt...10#post1807410
but after Andrew T recommendation - one post ubove I did extension with gray wire
one last thing - I don't have safety network - I only experiment at that point